Category: Admin’s blog

This is the latest Free Version of Ham Radio Deluxe 5.0.2893 compiled by Simon Brown. Download here HRD_5.0.2893 Borland Turbo C 2.01 original (3 floppy)…

Recently I’ve bought a little specimen of Autunite from China. My sample is 20mm in lenght, 15mm width and 6mm thick with nice green lamellar…

I’ve bough from eBay a NER10 X-Ray generator tube. It was build in 1925-1930 I don’t know exactly when. It’s interesting to see how well…

How to set correctly the PRT-E750W and PRT-E1500W  (are equals except for the power capability) VFD supplied with CNC 3020 and CNC 6040 chinese routers….

This is my actual collection of radioactive sources. Thorium Kodak lens Kodak had made some 35mm analog film models of cameras (1950-1970) like Retina IIIc,…

MadEXP PMT Adapter v2.0 schematic/gerber files plus license. Click on the link to download. MadExp PMT MadEXP PMT Adapter v2.5 schematic/gerber files plus license. Click…

This is my first didactic 8bit – Z80 based computer. I’ve made it because I was interested into homebrew a working computer from TTL chips…

This is a γ-selective Geiger counter from the “M” professional serie used also in demonstration devices for measuring the age of minerals by the activity…

This is equivalent to SBM20 Tech. spec.: ·Radiation determine: beta ( > 0.25 MeV) ; gamma soft/hard ·Voltage of start of counting: 280 – 330…

This tube is very hard to find. It’s made from alluminium and glass and is a β-selective Geiger counter. It’s counts only beta’s! Tech. spec.:…